Sony HCD-GT22, HCD-GT55, HCD-GT44 User Manual
HCD-GT22/GT44/GT55
SERVICE MANUAL
Ver. 1.2 2008.05
• HCD-GT22 is the amplifier, USB, CD pla yer , tape
deck and tuner section in MHC-GT22/GT22BP.
• HCD-GT44 is the amplifier, USB, CD pla yer , tape
deck and tuner section in MHC-GT44/GT44BP.
• HCD-GT55 is the amplifier, USB, CD pla yer , tape
deck and tuner section in MHC-GT55/GT55BP.
CD
Section
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CWN42FF609
Photo: HCD-GT55
Model Name Using Similar Mechanism NEW
CD Mechanism Type
Base Unit Name BU-K6BD91UR-WOD74
Optical Pick-up Block Name KSM-213DCP
E Model
HCD-GT22/GT44/GT55
Australian Model
HCD-GT22/GT44
CDM74KF-K6BD91UR-WOD or
CDM74KFV-K6BD91UR-WOD
Amplier section
HCD-GT55
The following are measured at AC 120, 127,
220, 240V 50/60Hz
Front speaker
Power output (rated): 110 W + 110 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
200 W + 200 W (per channel at 6 Ω,
1 kHz, 10% THD)
Subwoofer
RMS output power (reference): 190 W
(at 6 Ω, 80 Hz, 10% THD)
HCD-GT44
The following are measured at AC 120, 127,
220, 240V 50/60Hz
Front speaker
Power output (rated): 90 W + 90 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
150 W + 150 W (per channel at 6 Ω,
1 kHz, 10% THD)
Subwoofer
RMS output power (reference): 150 W
(at 6 Ω, 80 Hz, 10% THD)
SPECIFICATIONS
HCD-GT22
The following are measured at AC 120, 127,
220, 240V 50/60Hz
Power output (rated): 110 W + 110 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
200 W + 200 W (per channel at 6 Ω,
1 kHz, 10% THD)
Inputs
AUDIO (phono jack): voltage 250 mV,
impedance 47 kilohms
MIC (phone jack): sensitivity 1 mV,
impedance 10 kilohms
(USB) port: Type A
Outputs
PHONES (stereo mini jack): accepts
headphones of 8 Ω or more
SPEAKER: accepts impedance of 6 to 16 Ω
SUB WOOFER OUT (HCD-GT55/GT44
only): accepts impedance of 6 to 16 Ω
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 – 320 kbps, VBR
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32/44.1/48 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
CD player section
System: Compact disc and digital audio
system
Laser: Semiconductor laser (λ=770 –
810 nm)
Emission duration: continuous
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
– Continued on next page –
9-887-722-03
2008E05-1
© 2008.05
COMPACT DISC DECK RECEIVER
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-GT22/GT44/GT55
Tape deck section
Recording system: 4-track 2-channel, stereo
Frequency response: 50 – 13,000 Hz (±3
dB), using Sony TYPE I cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section:
Tuning range:
87.5 – 108.0 MHz (50 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
Latin American and Oceanian
models:
530 – 1,710 kHz (with 10 kHz tuning
interval)
531 – 1,710 kHz (with 9 kHz tuning
interval)
Other models:
530 – 1,610 kHz (with 10 kHz tuning
interval)
531 – 1,602 kHz (with 9 kHz tuning
interval)
Antenna: AM loop antenna, external
antenna terminal
Intermediate frequency: 450 kHz
General
Power requirements
Oceanian model: AC 230 – 240 V,
50/60 Hz
Mexican model: AC 127 V, 60 Hz
Argentine model: AC 220 V, 50/60 Hz
Other models: AC 120, 220 or
230 – 240 V, 50/60 Hz, Adjustable
with voltage selector
Power consumption
HCD-GT55: 225 W
HCD-GT44: 250 W
HCD-GT22: 150 W
Dimensions (w/h/d) (excl. speakers)
HCD-GT55:
Approx. 280 × 365 × 425 mm
HCD-GT44/GT22:
Approx. 280 × 325 × 425 mm
Mass (excl. speakers)
HCD-GT55: 10.5 kg
HCD-GT44/GT22: 10.0 kg
Design and specifications are subject to
change without notice.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
This appliance
is classified
as a CLASS 1
LASER product.
This marking is
located on the rear
exterior.
2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
TABLE OF CONTENTS
HCD-GT22/GT44/GT55
Ver. 1.1
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Case (Side-L), Case (Side-R) .......................................... 8
3-3. Case (Top) ....................................................................... 8
3-4. Lid (CD) .......................................................................... 9
3-5. CD Mechanism Deck, USB board .................................. 9
3-6. Front Panel Block............................................................ 10
3-7. Mecha Deck (CWN42FF609) ......................................... 10
3-8. Back Panel Block ............................................................ 11
3-9. MAIN Board.................................................................... 11
3-10. CD Board......................................................................... 12
3-11. DRIVER Board, SW Board............................................. 12
3-12. Optical Pick-up Block (KSM-213D)............................... 13
3-13. SENSOR Board ............................................................... 13
3-14. MOTOR (TB) Board ....................................................... 14
3-15. MOTOR (LD) Board....................................................... 14
4. TEST MODE.............................................................. 15
5. MECHANICAL ADJUSTMENTS ....................... 19
6. ELECTRICAL ADJUSTMENTS ......................... 20
7. DIAGRAMS
7-1. Block Diagram – CD SERVO, USB Section – ............... 23
7-2. Block Diagram – MAIN Section –.................................. 24
7-3. Block Diagram – AMP Section – .................................... 25
7-4. Block Diagram – PANEL, POWER AMP Section –....... 26
7-5. Printed Wiring Board – CD Board – ............................... 28
7-6. Schematic Diagram – CD Board – .................................. 29
7-7. Printed Wiring Boards – CHANGER Section –.............. 30
7-8. Schematic Diagram – CHANGER Section – .................. 31
7-9. Printed Wiring Board – USB Board – ............................. 32
7-10. Schematic Diagram – USB Board –................................ 33
7-11. Printed Wiring Board – TC Board –................................ 34
7-12. Schematic Diagram – TC Board – .................................. 35
7-13. Printed Wiring Boards – MAIN Section – ...................... 37
7-14. Schematic Diagram – MAIN Section (1/4) – .................. 38
7-15. Schematic Diagram – MAIN Section (2/4) – .................. 39
7-16. Schematic Diagram – MAIN Section (3/4) – .................. 40
7-17. Schematic Diagram – MAIN Section (4/4) – .................. 41
7-18. Printed Wiring Board – MIC Board – ............................. 42
7-19. Schematic Diagram – MIC Board – ................................ 43
7-20. Printed Wiring Board
– AMP Board (GT22/GT55) – ........................................ 44
7-21. Schematic Diagram – AMP Board (GT22/GT55) –........ 45
7-22. Printed Wiring Board – AMP Board (GT44) – ............... 46
7-23. Schematic Diagram – AMP Board (GT44) – .................. 47
7-24. Printed Wiring Boards
– SUB WOOFER Section (GT44/GT55) – ..................... 48
7-25. Schematic Diagram
– SUB WOOFER Section (GT44/GT55) – ..................... 49
7-26. Printed Wiring Boards – PANEL Section –..................... 50
7-27. Schematic Diagram – PANEL Section – ......................... 51
7-28. Printed Wiring Boards – KEY Section – ......................... 52
7-29. Schematic Diagram – KEY Section – ............................. 53
7-30. Printed Wiring Board
– TRANS Board (GT22/GT55) –.................................... 54
7-31. Schematic Diagram
– TRANS Board (GT22/GT55) –.................................... 55
7-32. Printed Wiring Board – TRANS Board (GT44) – ........... 56
7-34. Schematic Diagram – TRANS Board (GT44) – ............. 57
8. EXPLODED VIEWS
8-1. Case Section .................................................................... 69
8-2. KEY TOP Board Section................................................. 70
8-3. TC Mecha Deck Section.................................................. 71
8-4. PANEL Board Section..................................................... 72
8-5. Front Panel Section ......................................................... 73
8-6. MAIN Board Section....................................................... 74
8-7. POWER Board, SUB WOOFER Board Section ............. 75
8-8. Chassis Section................................................................ 76
8-9. CD Mechanism Deck Section-1
(CDM74KF-K6BD91UR-WOD or
CDM74KFV-K6BD91UR-WOD)................................... 77
8-10. CD Mechanism Deck Section-2
(CDM74KF-K6BD91UR-WOD or
CDM74KFV-K6BD91UR-WOD)................................... 78
9. ELECTRICAL PARTS LIST................................ 79
3
HCD-GT22/GT44/GT55
Ver. 1.2
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
RELEASING THE ANTITHEFT LOCK
The disc table lock function for the antitheft of an demonstration
disc in the store is equipped.
MODEL IDENTIFICATION
– Model Number Label –
Power Voltage
Indication
Model Power voltage indication
GT22: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 150W
GT22: E13, AUS AC: 230-240V - 50/60Hz 150W
GT22: MX ca-127V 60Hz 150W
GT22: AR ca 220V - 50/60Hz 150W
GT44: E13, AUS AC: 230-240V - 50/60Hz 250W
GT44: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 250W
GT44: MX ca-127V 60Hz 250W
GT44: AR ca 220V - 50/60Hz 250W
GT55: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 225W
GT55: MX ca-127V 60Hz 225W
GT55: AR ca 220V - 50/60Hz 225W
• Abbreviation
AR : Argentina model
AUS: Australian model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E13 : 220V - 230V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
HOW TO OPEN THE TRAY WHEN POWER SWITCH
TURN OFF
Releasing Procedure :
1. Press the
I/1 button to turn the power on.
2. Press the CD button to select “CD”.
3. While pressing the x button, press the Z button until
“UNLOCKED” displayed on the fluorescent indicator tube
(around 5 seconds).
Note: When “LOCKED” is displayed, the antitheft lock is not released by
turning power on/off with the I/1 button.
4
1
Turn the gear (loading A)
to the direction of the arrow.
2
HCD-GT22/GT44/GT55
)
Ver. 1.1
SERVICE POSITION
In checking the CD mechanism deck, prepare jig (extension cable J-2501-248-A (27 core/300 mm))/J-2501-077-A (13 core/300 mm)
MAIN board
Connect jig (extension cable J-2501-248-A
to the flexible flat cable (27 core) and
CD board (CN202).
CD mechanism deck
Connect jig (extension cable J-2501-077-A)
to the flexible flat cable (13 core) and
DRIVER board (CN701).
NOTE OF REPLACING CD MECHANISM DECK
As for except Mexican model, CD mechanism deck has been changed from CDM74KF-K6BD91UR-WOD to CDM74KFV-K6BD91URWOD on the way of production.
Please repair after confirming which type repaired CD mechanism deck is without fail according to ho w to distinguish the figure below when
you repairing exchange each part of CD mechanism deck.
DISCRIMINATION
for CDM74KF-K6BD91UR-WOD
CD mechanism deck
for CDM74KFV-K6BD91UR-WOD
– lifter (KSM) –
– lever (lifter) –
5
HCD-GT22/GT44/GT55
• Location of Controls
SECTION 2
GENERAL
This section is extracted from
instruction manual.
Unit
HCD-GT55
HCD-GT44/GT22
* HCD-GT44 only
Remote
1
4/1 (on/standby)
Press to turn on the system.
Unit: STANDBY indicator
Lights up when the system is off.
2
Remote sensor
3
DISPLAY
Press to change the information on the
display.
Unit: ILLUMINATION
Press to change the illumination pattern
around MASTER VOLUME
qg
4
CD
Press to select the CD function.
TUNER/BAND
Press to select the TUNER function.
Press to select FM or AM reception
mode.
Unit: T APE A/B
Press to select the TAPE function. Press
to select TAPE A or TAPE B.
Unit: AUDIO
Press to select the AUDIO function.
USB
Press to select the USB function.
Remote: FUNCTION
Press to select the function.
5
(HCD-GT55/GT44 only)
SUBWOOFER
Press to turn on and off the subwoofer.
SUBWOOFER indicator
Lights up when the subwoofer is on.
6
Z PUSH
Press to insert or eject a tape.
7
ERASE
Press to erase MP3 files and folders
from the connected optional USB device
(Digital music player or USB storage
media).
.
8
Unit: PRESET EQ,
GROOVE, SURROUND
Remote: EQ
Press to select the sound effect.
9
PLAY MODE/TUNING MODE
(HCD-GT55 only)
Press to select the play mode of a CD,
MP3 disc or an optional USB device
(Digital music player or USB storage
media).
Press to select the tuning mode.
EQ BAND (HCD-GT44/GT22 only)
Press to select the frequency band.
q;
PHONES jack
Connect the headphones.
qa
AUDIO INPUT L/R jacks
Connect to an audio component
(Portable audio player, etc.).
qs
(USB) port
Connect an optional USB device (Digital
music player or USB storage media).
qd
REC/ERASE indicator
Lights up when recording to the
connected optional USB device (Digital
music player or USB storage media), or
when erasing MP3 files or folders.
qf
MIC jack
Connect an optional microphone.
MIC LEVEL
Turn to adjust the microphone volume.
qg
Unit: MASTER VOLUME
Turn to adjust the volume.
Remote: VOLUME +/–
Press to adjust the volume.
qh
OPERATION DIAL
Turn to select a track, file or folder.
qj
Unit: NX (play/pause)
Remote: N (play)
X (pause)
Press to start or pause playback.
x (stop)
Press to stop playback.
./> (go back/go forward)
Press to select a track or file.
Unit: TUNING +/–
Remote: +/– (tuning)
Press to tune in the desired station.
+/– (select folder)
Press to select a folder.
m/M (rewind/fast forward)
Press to find a point in a track or file.
qk
CD-USB SYNC/REC1
Press to record from a disc onto the
connected optional USB device (Digital
music player or USB storage media).
CD-TAPE SYNC
TAPE REC PAUSE/START
Press to record onto a tape.
ql
Z OPEN/CLOSE
Press to insert and eject a disc.
w;
Unit: DISC 1 – 3
Press to select a disc. Press to switch to
the CD function from other function.
Unit: DISC SKIP/EX-CHANGE
Press to select a disc. Press to exchange a
disc while playing.
Remote: DISC SKIP
Press to select a disc.
wa
RETURN
Press to return to the parent folder.
Press to exit search mode.
ws
ENTER
Press to enter the settings.
wd
(HCD-GT55 only)
ENTER
Press to enter the settings.
+/– (equalizer level)
Press to adjust the equalizer level.
wf
(HCD-GT55 only)
BASS
Press to select low frequency. The
indicator lights up when the button is
pressed.
VOCAL
Press to select mid frequency. The
indicator lights up when the button is
pressed.
GUITAR
Press to select high frequency. The
indicator lights up when the button is
pressed.
FOCUS
Press to emphasize equalizer level of the
selected band.
wg
CLOCK/TIMER SELECT
CLOCK/TIMER SET
Press to set the clock and the timers.
wh
REPEAT/FM MODE
Press to listen to a disc, an USB device, a
single track or file repeatedly.
Press to select the FM reception mode
(monaural or stereo).
wj
Battery compartment lid
wk
CLEAR
Press to delete a pre-programmed track
or file.
wl
TUNER MEMORY
Press to preset the radio station.
e;
PLAY MODE/TUNING MODE
Press to select the play mode of a CD,
MP3 disc or an optional USB device
(Digital music player or USB storage
media).
Press to select the tuning mode.
ea
SLEEP
Press to set the Sleep Timer.
6
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SET
3-2. CASE (SIDE-L), CASE (SIDE-R)
(Page 8)
3-3. CASE (TOP)
(Page 8)
SECTION 3
DISASSEMBLY
HCD-GT22/GT44/GT55
Ver. 1.1
3-4. LID (CD)
(Page 9)
3-5. CD MECHANISM DECK, USB BOARD
(Page 9)
3-6. FRONT PANEL BLOCK
(Page 10)
3-7. MECHANICAL DECK
(CWM42FF609)
(Page 10)
3-8. BACK PANEL BLOCK
(Page 11)
3-9. MAIN BOARD
(Page 11)
3-10. CD BOARD
(Page 12)
3-12. OPTICAL PICK-UP BLOCK
3-11. DRIVER BOARD,
SW BOARD
(Page 12)
(KSM-213D)
(Page 13)
3-13. SENSOR BOARD
(Page 13)
3-14. MOTOR (TB) BOARD
(Page 14)
3-15. MOTOR (LD) BOARD
(Page 14)
7
HCD-GT22/GT44/GT55
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L), CASE (SIDE-R)
3
case (side-L)
2
two screws
1
three screws
(case 3 TP2)
(BVTP3
×
10)
6
case (side-R)
3-3. CASE (TOP)
2
Open the case (top).
4
four claws
2
Open the case (top).
3
4
three screws
(case 3 TP2)
1
5
two screws
(BVTP3
×
case (top)
5
two screws
(BVTP3
10)
×
10)
2
Open the case (top).
8
HCD-GT22/GT44/GT55
)
Ver. 1.1
3-4. LID (CD)
1
Turn the gear (loading A)
to the direction of the arrow.
3
four claws
2
4
lid (CD
3-5. CD MECHANISM DECK, USB BOARD
8
CD mechanism deck
(CDM74KF-K6BD91UR-WOD or
CDM74KFV-K6BD91UR-WOD)
4
connector (CN901)
0
USB board
9
two screws (M2.6)
5
connector (CN903)
6
screw
(BVTP3
×
8)
1
flexible flat (13 core) cable
(CN701)
2
flexible flat (27 core) cable
(CN302)
7
three screws
(BVTP3
×
8)
3
flexible flat (21 core) cable
(MAIN board: CN301/USB board: CN907)
6
screw (BVTP3 × 8)
9
HCD-GT22/GT44/GT55
3-6. FRONT PANEL BLOCK
6
front panel block
4
two connectors
(CN301, CN302)
5
four screws
(BVTP3
3-7. MECHA DECK (CWN42FF609)
mecha deck
3
(CWN42FF609)
1
flexible flat cable (27 core)
(CN901)
2
flexible flat cable (11 core)
(CN201)
3
flexible flat cable (13 core)
2
(CN061)
1
six screws
(BVTP2.6
×
8)
×
8)
10
3-8. BACK PANEL BLOCK
d
3
connector
(CN701)
(except Australian model)
2
connector
(CN041)
5
back panel block
HCD-GT22/GT44/GT55
1
flexible flat cable (9 core)
(tuner (FM/AM))
4
two screws
(BVTP3 × 10)
(GT44/GT55)
4
two screws
(BVTP3 × 10)
3-9. MAIN BOARD
3
connector
(CN907)
2
connector
(CN903)
8
two screws
(BVTT4
4
two screws
(BVTP3 × 10)
×
8)
qs
POWER board
7
screw
(BV3)
4
connector
(CN271)
qa
0
MAIN boar
connector
(CN031)
1
flexible flat cable (11 core)
(CN008)
9
5
screw
(BVTP3
6
screw
(BVTP3
×
8)
×
8)
11
HCD-GT22/GT44/GT55
e
3-10. CD BOARD
5
Remove soldering from the four points.
1
3
cover (OP)
screw
(BVTP3
2
6
CD
board
screw
(BVTP2.6)
4
flexible flat (16 core) cabl
(CN301)
×
8)
3-11. DRIVER BOARD, SW BOARD
1
two
(BTTP (M2.6))
5
DRIVER
2
wire (flat type) (5 core)
(CN702)
board
screws
4
connector
(CN704)
CD machanism deck
(bottom side)
3
connector
(CN703)
6
screw
(BTTP (M2.6))
7
SW board
12
CD machanism deck
(bottom side)
3-12. OPTICAL PICK-UP BLOCK (KSM-213D)
qd
optical pick-up block
(KSM-213D)
8
two
7
two
coil springs
(insulator)
6
two floating
(PTPWH M2.6)
insulators
screws
9
qs
HCD-GT22/GT44/GT55
2
h
older (213) assy or holder (KSM) assy
1
floating
screw
(PTPWH M2.6)
5
two
insulators
4
two
coil springs
(insulator)
3
qa
C
D board
two floating
(PTPWH M2.6)
flexible flat
(CN301)
screws
cable (16 core)
Ver. 1.1
3-13. SENSOR BOARD
2
t
ray
0
1
floating
(PTPWH M2.6)
6
floating
(PTPWH M2.6)
7
g
ear (geneva)
Remove the four solders of motor.
screw
8
s
crew
(BTTP (M2.6))
0
SENSOR board
9
screw
connector
(
CN731)
3
b
elt (table)
4
floating
(PTPWH M2.6)
5
p
screw
ulley (table)
13
HCD-GT22/GT44/GT55
3-14. MOTOR (TB) BOARD
2
stopper
4
1
stopper
7
t
able motor assy (M741)
3
wire (flat type) (5 core) (CN742)
3-15. MOTOR (LD) BOARD
3
Remove the two solderings of motor.
4
l
oading motor assy (M751)
8
6
5
two
screws
(BTTP (M2.6))
2
two
(BTTP (M2.6))
MOTOR (TB) board
Remove the two solderings of motor.
screws
5
MOTOR (LD) board
14
1
b
elt (loading)
SECTION 4
TEST MODE
HCD-GT22/GT44/GT55
COLD RESET
The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning the
set to the customer.
Procedure:
1. Press three buttons of x , u and [GROOVE] simultaneously.
2. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
TUNING STEP CHANGE-OVER
A step of AM tuning interval can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [TUNER/BAND] button to select “AM”.
3. Press the I/1 button to turn the power off.
4. Press two buttons of [TUNING +] and I/1 simultaneously.
5. The message “AM 9K STEP” or “ AM 10K STEP” is displayed
on the fluorescent indicator tube, and thus the tuning interval
is changed over.
CD SHIP (LOCK) MODE
This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press two buttons of u and I/1 simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESET
This mode is used to perform CD ship (lock) mode and cold reset
simultaneously.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [ILLUMINATION] and I/1
simultaneously.
4. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
ANTITHEFT LOCK MODE
This mode is used to unable to take sample disc out of disc table in
the shop.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Insert a disc.
4. Press two buttons of x and Z for 5 seconds.
5. The message “LOCKED” is displayed on the fluorescent
indicator tube and the disc table is locked. (Even if pressing
the Z button, the message “LOCKED” is displayed on the
fluorescent indicator tube and the disc table is locked)
6. To release this mode, press two buttons of x and Z for 5
seconds.
7. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the disc table is unlocked.
AMP TEST MODE
This mode is used to display the parameter of amplifier IC and
display the VACS status.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press three buttons of x , u and [USB] simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplif ier adjustment mode is displayed on
the fluorescent indicator tube.
4. Press the [TAPE REC PAUSE/START] button to changed over
between VACS status display mode and the amplifier IC
parameter display mode.
5. In this mode, press the [GROOVE] button to changed over
DBFB on/off, and “DBFB ON” or “DBFB OFF” is displayed
on the fluorescent indicator tube.
6. In this mode, press the [SURROUND] button to changed over
surround on/off, and “SURROUND ON” or “SURROUND
OFF” is displayed on the fluorescent indicator tube.
− For GT22/GT44 −
7. In this mode, press the [EQ BAND] button to enter the equalizer
adjustment mode.
In the equalizer adjustment mode, press the [EQ BAND] button
to change over the adjustment band as LOW/MID/HIGH. And
turn the [OPERATION DIAL] knob to adjust the equalizer lev el
of each bands.
− For GT55 −
7. In this mode, press the [BASS], [VOCAL] or [GUITAR] button
to enter the parametric equalizer adjustment mode.
In the parametric equalizer adjustment mode, press the [BASS],
[VOCAL] and [GUITAR] button to change over the adjustment
band. And press the [BASS], [VOCAL] or [GUITAR] button to
change over the equalizer frequency of each bands, or press
the [+] and [--] buttons to adjust the equalizer level of each
bands.
8. To release the amplifier IC parameter display mode or equalizer
adjustment mode, press the
I/1 button to the power off.
MC TEST MODE
This mode is used to check operations of microprocessor.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press three buttons of x , u and [AUDIO] simultaneously.
3. When the MC test mode is activated, VACS lev el is displayed
on the fluorescent indicator tube momentarily.
4. Press the [TUNING +] button, the message “ALL EQ MAX”
is displayed on the fluorescent indicator tube momentarily
and press the [TUNING --] button, the message “ ALL EQ MIN”
is displayed on the fluorescent indicator tube momentarily.
5. Press the [ENTER] button, the message “ALL EQ FLAT” is
displayed on the fluorescent indicator tube momentarily.
6. Turn the [VOLUME] knob cloc kwise, the message “VOLUME
MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [VOLUME] knob counterclockwise,
the message “VOLUME MIN” is displayed on the fluorescent
indicator tube momentarily.
7. Press the [TAPE REC PAUSE/START] button to changed over
VACS on/off.
8. Press the I/1 button to release from this mode, then cold reset
is performed.
15
HCD-GT22/GT44/GT55
VERSION DISPLAY MODE
This mode is used to check the model, destination and software
version.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press three buttons of x , u and [ILLUMINATION] simultaneously.
3. When this mode is activated, model type and destination (*1)
are displayed on the fluorescent indicator tube.
*1) GRL2H : HCD-GT22
GRL2HS : HCD-GT44
GRL3HS : HCD-GT55
Example: GRL3HS_LATIN: Latin American models of HCD-GT55
4. Press the [TAPE REC PAUSE/START] button to display the software version (*2) and year, month, day of the software creation.
*2) G**.*** : The version of system controller (IC901 on the MAIN
board).
M**.*** : The version of USB control module in the sysytem
controller.
U**.*** : The version of USB controller (IC901 on the USB
board).
5. To release this mode, press three buttons of x , u and
[ILLUMINATIOM] simultaneously.
CD ERROR CODE DISPLAY MODE
This mode can be used for error code display of CD section.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [CD] and [SURROUND] simultaneously.
4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.
5. Press the [ENTER] button to changed over between optical
pick-up error code display mode and mechanism deck error
code mode.
Note: There are two [ENTER] buttons on the HCD-GT55, but it works in
the same way whichever button is pressed.
6. Press the [TUNING +]/[TUNING ---] button to change over dis-
play of error history number.
7. To release this mode, press the I/1 button to turn the power
off.
1. Mechanism Deck Error Code Mode
When this mode is entered, mechanism deck error code is displayed
with the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The second digit from the left indicates:
(Error history number display)
The second digit from the left indicates which order the error history
is. “0” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
00 No error
08 Table operation time-out (Table does not move to the tar get
position within the specified time)
16 In the chucking down operation, the operation was retried
by the maximum number of times but the operation could
not be completed
17 In the chucking up and down operation, the reverse
recovery processing was attempted but it could not be
recovered
18 In the chucking up operation, the operation was retried by
the maximum number of times but the operation could not
be completed
20 Loading operation time-out (Table does not move to the
target position within the specified time)
22 As the chuck was in the ex-open status at the initialization,
the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
Display Status
01 Open completion status
02 From open status, the movement to chucking down position
is under way
03 From chucking down position, the open operation is under
way
04 Chucking down completion status
10 The chucking down operation is under way
11 The chucking up operation is under way
12 Close completion status
13 From close status, the ex-open operation is under way
14 From ex-open status, the close operation is under way
18 Ex-pen completion status
The 7th and 8th digit from the left indicates:
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.
Display Status
× 0 No table motor output
× 1Table motor forward output
× 2Table motor backward output
× 3Table motor break output
0 × No loading motor output
1 × Loading motor forward output
2 × Loading motor backward output
3 × Loading motor break output
16
HCD-GT22/GT44/GT55
The 9th and 10 th digit from the left indicates:
(Tray status display)
The 9th and 10th digit from the left indicates which target processing
when an error occurred is indicated.
Display Status
01 Open operation
12 Close operation
18 Ex-open operation
2. Optical Pick-up Error Code Mode
When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “0” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
01 Not focused (TOC read without a disc)
02 GFS NG (TOC read with a disc chucked)
03 Start operation time-over
04 Defocused continuously (Defocused during TOC reading)
05 Q code not entered for specified time
06 Tracking not turned ON
07 Blank disc (Blank disc TOC read)
The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
Display Contents
01 Power OFF in progress
02 Initialize in progress
03 Oscillation stopping
04 From oscillation stop, oscillation starting
05 Stopping
06 Stop operation is under way
07 Start operation in progress
08 TOC read in progress
09 Search operation is under way
0A Playback operation is under way
0B Pause operation is under way
0C Playback manual search operation is under way
0D Pause manual search operation is under way
0E —
The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
5 REPEAT LIMIT CANCEL MODE
Number of repeat for CD playback is 5 times when the repeat mode
is “REPEAT”. This mode is used to enables CD to repeat playback
for limitless times.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [CD] and u simultaneously.
4. The message “LIMIT OFF” is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
CD/USB POWER MANAGE
This mode is used to changed over CD and USB power on/off for
decreasing of reception noise in the tuner mode.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press the I/1 button to turn the power off.
4. Press two buttons of x and I/1 simultaneously.
5. The message “CD POWER ON” or “CD POWER OFF” is
displayed on the fluorescent indicator tube, and CD and USB
power on/off changed over in the tuner mode.
BOOSTER ON/OFF
This mode is used to changed over MP3 booster on/off.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [USB] button to select “USB”.
3. Press three buttons of x , [SURROUND] and [USB] simulta-
neously.
4. The message “BOOSTER ON” or “BOOSTER OFF” is
displayed on the fluorescent indicator tube, and MP3 booster
on/off changed over.
EXCITER ON/OFF
This mode is used to changed over the exciter on/off.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Insert a MP3 disc.
4. Press three buttons of x ,[SURROUND] and [AUDIO] simul-
taneously.
5. The message “EXCITER ON” or “EXCITER OFF” is
displayed on the fluorescent indicator tube, and the exciter
on/off changed over.
CD SERVICE MODE
This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [FOLDER ---] and [SURROUND]
simultaneously, the message “SERVICE” is displayed on the
fluorescent indicator tube.
4. Press the [TUNING ---] button to move the optical pick-up to
inside track and the message “SLED IN” is displayed on the
fluorescent indicator tude, or press the [TUNING +] button to
outside track and the message “SLED OUT” is displayed on
the fluorescent indicator tude.
5. Press the [DISPLAY] button, “LD ON” or “LD OFF” is displayed on the fluorescent indicator tude. Each time [DISPLAY]
button is pressed, laser diode on/off is changed over.
6. To release this mode, press three buttons of x , [FOLDER ---]
and [SURROUND].
17
HCD-GT22/GT44/GT55
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs, phones jack, keys and control knobs.
Procedure:
1. Press the I/1 button to turn the power on.
2. Press three buttons of x , [SURROUND] and [TUNER] simultaneously.
3. All segments on the fluorescent indicator tube and all LEDs light up.
4. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key routes check mode.
5. In this mode, each time any button is pressed, it displays key route and key number of the button. (Refer to following table)
KeyKey Routes
No. KEY0 KEY1 KEY2 KEY3 KEY4 (GT55 only)
1 DISPLAY ILLUMINATION ENTER DISC 1 +
2 POWER ERASE RETURN DISC 2 ENTER(PEQ)
3 CD PRESET EQ FOLDER + DISC 3 –
4 TUNER/BAND GROOVE TUNING +
5 TAPE A/B SURROUND PLA Y/PAUSE STOP FOCUS (GUITAR)
6 AUDIO
7 USB FOLDER – CD-TAPE SYNC VOCAL
SUBWOOFER
8
(GT44/GT55) PAUSE/START
9 FOCUS (BASS)
EQ BAND (GT22/GT44)
PLAY MODE (GT55)
TUNING – CD-USB SYNC/REC1 FOCUS (VOCAL)
OPEN/CLOSE
Example: [DISPLAY] button : “KEY 10000”
[TUNER/BAND] button : “KEY 40000”
[ILLUMINATION] button : “KEY 01000”
[CD-TAPE SYNC] button : “KEY 00070”
EX-CHANGE/
DISC SKIP
TAPE REC
GUITAR
BASS
6. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key check mode.
7. In this mode, each time any button is pressed, “KEYCONT” value increases. Howev er, once a button is pressed, it is no longer
taken into account. (Maximum numbers are GT22: 29, GT44: 30, GT55: 39)
8. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the phones jack check mode.
9. In this mode, “H_P ON” is displayed when phones jack is inserted, and “H_P OFF” is displayed when phones jack is pulled out.
10. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the volume check mode and display “VOLUME
FLAT”.
11. In this mode, “VOLUME UP” is displayed when [VOLUME] knob is turned clockwise, and “VOLUME DOWN” is displayed
when [VOLUME] knob is turned counterclockwise.
12. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the jog check mode and display “JOG FLAT”.
13. In this mode, “JOG UP” is displayed when [OPERATION DIAL] knob is turned clockwise, and “JOG DOWN” is displayed when
[OPERATION DIAL] knob is turned counterclockwise.
14. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to release the Panel Test mode.
18
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head magnetizer close to the
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, appiy suitable locking compound to
the parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
TORQUE MEASUREMENT
Mode Torque Meter Meter Reading
2.6 – 6.9 mN⋅m
FWD CQ-102C (30 – 70 g⋅cm)
(0.41 – 0.97 oz⋅inch)
FWD
Back Tension
FF/REW CQ-201B 55 – 170 g⋅cm)
CQ-102C (1.5 – 6.0 g⋅cm)
0.15 – 0.59 mN⋅m
(0.021 – 0.083 oz⋅inch)
5.4 – 16.7 mN⋅m
0.76 – 2.35 oz⋅inch)
HCD-GT22/GT44/GT55
TAPE TENSION MEASUREMENT
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 100 g
(more than 3.53 oz)
19
HCD-GT22/GT44/GT55
r
SECTION 6
ELECTRICAL ADJUSTMENTS
0 dB=0.775 VDECK SECTION
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
TEST TAPE
Tape Signal Used for
P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment
RECORD/PLA YBA CK HEAD AZIMUTH ADJUSTMENT
Note: Perform this adjustment for both decks.
Procedure:
1. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
MIC board
PHONES jack
(J803)
set
level mete
+
–
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (DECK-A)
Record/Playback/Erase Head (DECK-B)
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
Output
level
within
1dB
L-CH
peak
R-CH
peak
within
1dB
Screw
position
L-CH
peak
Screw
position
R-CH
peak
3. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
MIC board
PHONES jack
(J803)
oscilloscope
H
V
20
waveform of oscilloscope
–45
°
0°+45
good
°
+90
°
+135°+180
wrong
°
HCD-GT22/GT44/GT55
+
–
CD board
TP121 (RFI)
TP124 (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2
±
0.3 Vp-p
TUNER SECTION
FM TUNE LEVEL CHECK
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.
When the selected station signal is received in good condition,
“TUNED” is displayed.
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the I/1 button to turn the power ON.
3. Set disc (YEDS-18) on the tray and press the u button to
playback.
4. Confirm that oscilloscope waveform is as shown in the f igure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
Checking Location:
– CD Board (Conductor Side) –
TP124
(VC)
TP121
(RFI)
IC101
21
HCD-GT22/GT44/GT55
MEMO
22
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM – CD SERVO, USB Section –
HCD-GT22/GT44/GT55
DETECTOR
A
B
C
D
I-V AMP
E
F
LASER DIODE
PD
LD
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
M401
(SPINDLE)
M402
(SLED)
2-AXIS
DEVICE
(TRACKING)(FOCUS)
M
M
VCC
SP+
SP–
SL+
SL–
BD+3.3V
A
B
C
D
E
F
AUTOMATIC
LD
PD
VC
T+
T–
F+
F–
POWER
CONTROL
Q301
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: CD PLAY
: USB
95
FNi1 (A)
97 FPi1 (B)
94 FNi2 (C)
96 FPi2 (D)
100 TNi (E)
98 TPi (F)
91 LDo 92MDi
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
2 VO1+
1 VO1–
12 VO2–
11 VO2+
18 VO3+
17 VO3–
26 VO4+
27
VO4–
IC401
MUTE
7
RFo
89
3RFRP RFZi
23
BIAS
3
IN1
9
IN2’
20
IN3’
24
IN4’
S201
(LIMIT)
X102
16.9344MHz
BD+3.3V
88
AGCi
2
76TEi TEZi
84 VRo
13 DMo
12 FMo
10 TRo
9 FOo
20 IO0 (/HSO)
23 XI
24 XO
83RFEQo 81 RFi
82 RFRPi
CD-MP3 PROCESSOR
IC101
30LO
27RO
R-CH
47AOUT2 (PO5)
63
BCK (PO8)
65AIN (PI4)
66BCKi (PI5)
67LRCKi (PI6)
51PIO3
46AoUT3 (PO4)
38BUS0
39BUS1 3 4 16 CD-BUS1 (I/O)
40BUS2 (SO) 9 8 15 CD-BUS2 (I/O)
41BUS3 (SI) 11 10 14 CD-BUS3 (I/O)
42BUCK (CLK) 4
43XCCE
48PIO0
54SBSY
37XRST
DATA
CLK
A-IN
BCK
LRCK
GATE
ST-REQ
BUS SWITCH
IC301
1 2 17 CD-BUS0 (I/O)
1 2
3 4
9 8
11 10
DATA SELECTOR
7
14
13
10
11
BUS SWITCH
IC302
IC303
SELECT
1
13
5
6
BUS0-U
13
BUS1-U
5
BUS2-U
6
BUS3-U
12
2
BUCK-U
3
5
6
12
9
CCE-U
REQ-U
SYSTEM CONTROLLER
19 CD-SEL112
12 CD-BUCK
13 CD-CCE
18 MP3 IREQ
21 CD-SEL2
29 I-SBSY
6 CD XRST
7
CD-M-MUTE
IC901 (1/4)
CD-L
O-USB-LED
O-LM-F
O-LM-R
O-TM-F
O-TM-R
I-CD-SENS
I-ENCD
I-OPEN-SW
(Page 24)
A
43O-USB-TXD (SO)
42I-USB-RXD (SI)
10O-USB-RST (DO)
9I-USB-CTS (DI)
11O-USB-RESET
37
LOADING MOTOR DRIVE
23
7
9
22
TABLE MOTOR DRIVE
25
7
9
24
26
55
27
LED DRIVE
Q931
IC701
OUT1
FIN
OUT2
RIN
IC712
OUT1
FIN
RIN
OUT2
LEVEL SHIFT
Q731
ROTARY
ENCODER
S711
DATA
CLK
A-IN
BCK
LRCK
GATE
ST-REQ
BUS0-U
BUS1-U
BUS2-U
BUS3-U
BUCK-U
CCE-U
REQ-U
4
2
4
2
OPEN
CLOSE
85 DATA
86 CLOCK
93 DATA
92 BCK
71 LRCK
94 GATE
97 ST-REQ
55 BUS0
56 BUS1
57 BUS2
58 BUS3
59 /BUCK
60 /CCE
96 REQ
88 RXD1
87 TXD1
2DI
84 DO
1 /RESET
M751
M
(LOADING)
M741
M
(TABLE)
DISC TABLE
IC731
DISC TABLE
S751
DISC TABLE
OPEN/CLOSE
DETECT
75 X1
73 X2
D801
REC
(USB)
X901
9MHz
ADDRESS SENSOR
ADDRESS DETECT
USB CONTROLLER
IC901
USBOC
D0 – D15
A1 – A16
RD
79D+
80D–
VBUS
+5V
78USBPON
77
18 – 25, 28 – 35
37 – 43, 46 – 54
70CS2
64
65WR
66SRLLB
67SRLUB
VBUS POWER
ON/OFF SWITCH
IC915
4 OUT
IN
EN
FLG
1
S-RAM
7 – 10, 13 – 16,
29 – 32, 35 – 38
21 – 18, 5 – 1
44 – 42, 27 – 24,
CE6
OE41
WE17
LB
39
UB40
5
3
IC921
I/O0 – I/O15
A0 – A15
VBUS
CN803
(USB)
3
D+
2
D–
1
HCD-GT22/GT44/GT55
2323
HCD-GT22/GT44/GT55
Ver. 1.2
7-2. BLOCK DIAGRAM – MAIN Section –
HP1
(PB)
(DECK-A)
HRPE1
(REC/PB/ERASE)
(DECK-B)
ERASE
FM75Ω
(COAXIAL)
AM
L-CH
R-CH
L-CH
R-CH
ANTENNA
(Page 25)
(Page 23)
R-CH
R-CH
J801
MIC
TUNER (FM/AM)
FM ANT
AM ANT
B
A
MUTING
MUTING
MUTING
Q401, 403
T001
BIAS OSC
HP IN
J802
AUDIO
CD-L
Q305
Q307
BIAS OSC
Q453
TUNER-L
TUNER-R
PLL DO
PLL DI
PLL CLK
PLL CE
TUNED
AUDIO+9V
R-CH
R-CH
R-CH
REC BIAS
SWITCH
Q454, 455
PB SWITCH
PB SWITCH
MUTING CONTROL
CONTROL SWITCH
R-CH
MIC AMP
IC801 (1/2)
MUTING
Q801
(DECK-A)
Q301
R-CH
(DECK-B)
Q303
R-CH
MUTING
SWITCH
Q305, 306
Q407
AUDIO
+9V
SELECT SWITCH,
SELECT SWITCH
49
O-BIAS
31 I-LV23004T-DI
33 O-LV23004T-DO
32 O-LV23004T-CLK
28 O-LC72121-CE
34 I-TUNED
DECK-A/B
REC/PB
Q408
46
O-REC/PB
RV801
MIC LEVEL
+
REC SWITCH
REC CONTROL
Q409, 410
Q405
SWITCH
48
MIC AMP
IC801 (2/2)
R-CH
58
O-REC-MUTE
I-HP/MIC
PB AMP
IC301
REC AMP
IC401
R-CH
37 MIX2
210AUX-L
40 CD-L
39 TAPE-L
1 TUNER-L
DATA15CLK
16
41
45
O-F-DATA
O-AUDIO-CLK
3REC OUT-L
SYSTEM CONTROLLER
IC901 (2/4)
INPUT SELECTOR, TONE CONTROL,
ELECTRICAL VOLUME
IC103
(GT22/GT44)
(GT55)
PARAMETRIC EQUALIZER
IC102
2
LIN
44
9LOUT
DATA6CLK
5
O-P-DATA
11 VOL IN-LTONE OUT-L 14OUT-L
SAOUT
4
BAND-PASS
FILTER
Q111, 112
D213 D211
67
59
I-VACS
I-STREAM
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: TUNER (FM/AM)
: CD PLAY
: TAPE PLAY (DECK-A)
: TAPE PLAY (DECK-B)
• Abbreviation
AR : Argentina model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E13 : 220V - 230V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
: TAPE REC
: AUDIO IN
: MIC
OUT
(GT44/GT55)
J701
D-LIGHT
SYNC OUT
Q911, 914
Q913, 916
Q912, 915
BASS AGC
3
4
SW OUT
L+R SIGNAL
D-LIGHT B+
12BB12
13BB22
BASS AGC
+
R-CH
R-CH
D031
Q113
BUFFER
Q702
O-A-SOL
O-B-SOL
I-RELL-A
I-RELL-B
+4.1V
REGULATOR
Q701
85
88
87
78
79
60
CAPSTAN/REEL
MOTOR DRIVE
TRIGGER PLUNGER
DRIVE (DECK-A)
TRIGGER PLUNGER
DRIVE (DECK-B)
M+9V
(GT22: E2, E3, E13, E51, MX, AR/GT44: E2, E3, E13, E51, MX, AR/GT55)
O-MOTOR
I-TAPE-STAT
C
D
(Page 25)
E
(Page 25)
(Page 25)
TAPE MECHANISM
DECK BLOCK
CAMP+
M
A-SOL
B-SOL
A-PHOTO
B-PHOTO
B-REC-F
B-HALF
A-HALF
HCD-GT22/GT44/GT55
2424
7-3. BLOCK DIAGRAM – AMP Section –
HCD-GT22/GT44/GT55
E
(Page 24)
C
(Page 24)
BASS AGC
OUT
BUFFER
IC251
MUTING
Q251
R-CH
IC441 (GT22/GT55)
IC441 (GT44)
POWER AMP
STANDBY SWITCH
Q489
OVER LOAD
R-CH
TEMPERATURE
DETECT
Q441
+
DETECT
Q503, 507
DC DETECT
Q481, 482
+
OVER LOAD
DETECT
Q501
+
TH441
TEMPERATURE
DETECT
Q483, 484
+
++
DC DETECT
Q505, 506
R-CH
PROTECTOR
Q485
R-CH
D037
RELAY DRIVE
Q486, 488 (GT22)
Q480, 486, 488 (GT44/GT55)
PROTECT
DETECT
Q487
R-CH
HP IN
AUDIO+9V
R-CH
–1
JK441
+
–
–2
–
+
RY441
FAN MOTOR
DRIVE
Q043 – 045
M
FAN MOTOR
DETECT
Q046
+
M001
(FAN)
J803
PHONES
L
SPEAKER
R
PROTECT
B
F
(Page 24)
(Page 26)
SW OUT
D
(Page 24)
(GT44/GT55)
BUFFER
Q121
CONTROL SWITCH
MUTING
Q261
1
LINE AMP
IC252
O-SYS-MUTE
36
O-STK-MUTE
MUTING
Q272
POWER AMP
IC501
SYSTEM CONTROLLER
IC901 (3/4)
RY501
RELAY DRIVE
Q502
SUB WOOFER
SWITCH
Q274
2
O-SWR
JK501
+
SUB WOOFER OUT
–
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: TUNER (FM/AM)
HCD-GT22/GT44/GT55
2525
HCD-GT22/GT44/GT55
Ver. 1.2
7-4. BLOCK DIAGRAM – PANEL, POWER AMP Section –
FLUORESCENT INDICATOR
FL701
FLUORESCENT
INDICATOR
TUBE
GRID DRIVE
Q701 – 714
DR35 [S0] –
DR16 [S19]
38 – 19
DR0 [T0] –
DR13 [T13]
15, 16
2 – 13,
TUBE DRIVER
IC701
SCK
CSb
RSTb
XTb
XT
SI
46
OSC
45
SYSTEM CONTROLLER
IC901 (4/4)
O-NJM3427A-DATA49 84
O-NJM3427A2-CLK48 86
O-NJM3427FA2-CS51 68
O-NJM3427FA2-RESET52 69
FOR
FLUORESCENT
INDICATOR
TUBE
AMP
SECTION
B+
(GT22/GT55)
(GT44)
AMP
SECTION
B+
–VFL
+VH
–VH
+VL
–VL
+VCC
–VCC
PT901
MAIN POWER
TRANSFORMER
VF
VF
–27V
REGULATOR
Q902
RECT
D401
RECT
D402
RECT
D401
D908
F908
F909
F904
F905
F909
F904
D607
GUITAR
S601 – 608 (KEY0),
S611 – 616 (KEY1),
S621 – 628 (KEY2),
S631 – 638 (KEY3),
S641 – 649 (KEY4)
S608 (GT44/GT55),
S641 – 649 (GT55)
D601 – 606
(STREAM)
D608
VOCAL
(GT44/GT55)
SUBWOOFER
D609
BASS
D612
D611
STANDBY
KEY0 – KEY4 KEY0 – KEY3
S651
MASTER
VOLUME
S652
OPERATION
DIAL
REMOTE CONTROL
LED DRIVE
Q601 – 606
LED DRIVE
Q921 – 923
LED DRIVE
Q607
(GT55)
ROTARY
ENCODER
ROTARY
ENCODER
RECEIVER
IC601
KEY0
KEY4
O-S-LED1 –
O-S-LED6
70 – 75 61 – 64
O-G-LED,
O-V-LED,
38 – 40
O-B-LED
76 O-SWR-LED
77 O-STBY-LED
83 I-WAKEUPKEY
I-KEY0 –I-KEY3
56 I-KEY4
66 I-VOL
65 I-JOG
81 I-SIRCS-IN
RELAY B+
3O-FRONT-SP-RELAY
M+9V
M+7V
D301, 302
AUDIO+9V
UNREG +16V
B+ SWITCH
Q041, 042
D009
+9V
REGULATOR
IC021
+9V
REGULATOR
IC011
RECT
D021 – 024
RECT
D011 – 014
F907
• Abbreviation
AR : Argentina model
AUS : Australian model
E2 : 120V AC Area in E model
BD+3.3V
D+1.5V
4O-CD-POWER
USB+3.3V
8O-USB-POWER
52I-USB-MONI
+3.3V
VBUS+5V
EVER +10V
VDD+3.3V
D+3.3V,
VREF+3.3V
+1.5V
REGULATOR
IC201
D902
B+ SWITCH
Q301, 302
B+ SWITCH
Q303, 304
+4V
REGULATOR
Q901, 902
D008
+3.3V
REGULATOR
IC006
+5V
REGULATOR
IC007
D006
D902 – 905
RECT
D001
RECT
F906
PT902
SUB POWER
TRANSFORMER
E3 : 240V AC Area in E model
E13 : 220V - 230V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
GT22: MX, AR, AUS/
GT44: MX, AR, AUS/
GT55: MX, AR
GT22: E2, E3, E13, E51/
GT44: E2, E3, E13, E51/
GT55: E2, E3, E51
VOLTAGE
SELECTOR
S901
GT22: MX, AR, AUS/
GT44: MX, AR, AUS/
GT55: MX, AR
RY901
POWER ON/OFF
RELAY DRIVE
Q903
(AC IN)
HCD-GT22/GT44/GT55
X902
20MHz
X901
32.768kHz
95 X1
94 X2
92 XT1
91 XT2
90RESET
35I-AC-CUT
57I-PROTECTOR
5O-POWER-RELAY
RESET SWITCH
Q903 – 905
RESET SIGNAL
GENERATOR
IC902
D007
PROTECT
DETECT
Q011
LEVEL SHIFT
Q908
RECT
D910
PROTECT
F
(Page 25)
2626
HCD-GT22/GT44/GT55
)
• Note For Printed Wiring Boards and Schematic Diagrams
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• W : indicates side identified with part number.
• f : internal component.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Indication of transistor
C
Q
B
E
B
These are omitted.
Q
CE
These are omitted.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
[]: USB
– USB Board –
no mark : USB
– TC Board –
no mark : TAPE PLAY
(): T APE REC
〈〈 〉〉 : TAPE A
{ }: TAPE B
– Other Board –
no mark : TUNER (FM/AM)
(): CD PLAY
[]: TAPE PLAY
∗ : Impossible to measure
• Voltages are taken with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : TUNER (FM/AM)
J : CD PLAY
: USB
E : TAPE PLAY (DECK-A)
d : TAPE PLAY (DECK-B)
G : TAPE REC
f : AUDIO IN
N : MIC
• Abbreviation
AR : Argentina model
AUS: Australian model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E13 : 220V – 230V AC Area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
4
W or less unless otherwise
• Circuit Boards Location
KEY TOP board
(GT55)
KEY LEFT board
PANEL board
VOLUME board
MIC board
TRANS board
SW board
MOTOR (LD) board
D-LIGHT SYNC board (except Australian model)
CD board
SENSOR board
DRIVER board
TUNER (FM/AM
MOTOR (TB) board
USB board
KEY RIGHT board
SUB WOOFER board (GT44/GT55)
5V REG board
SW-SP board
(GT44/GT55)
MAIN board
HCD-GT22/GT44/GT55
AMP board
TC board
2727
HCD-GT22/GT44/GT55
7-5. PRINTED WIRING BOARD – CD Board –
1 2 3 4 5 6 7 8 9 10
A
CD BOARD
(COMPONENT SIDE)
C401
B
C405
C
R213
C201
R216
R121
C115
D
R211
C207
IC201
135
E
C206
R201
4
C205
C202
C204
F
• See page 27 for Circuit Boards Location.
R415
R118
C153
R112
R111
X102
R212
R214
C108
R119
C133
R155
C130
C128
C112
R114
C309
Q301
R302
E
C307
R303
R304
R301
1-872-620-
: Uses unleaded solder.
C106
C306
11
(11)
CD BOARD
TP124(VC)
C122
R140
C123
R142
R143
R151
C138
C140
TP121
(RFI)
C141
R144
C143
C144
C148
C149
(CONDUCTOR SIDE)
M401
(SLED)
C125
C124
R139
C137
C146
C139
C142
R148
C150
C147
R136
R135
C145
R146
R134
C118
C104
R145
R147
R149
R150
R129
R128
R130
C100
C105
C117
CN301
C136
C135
C120
C107
C119
M
IC101
C102
C101
C113
C103
R101
C126
C127
R109
R108
C303
R106
R102
C301
R402
R105
C302
R414
C109
(LIMIT)
C110
R154
R104
C132
S201
C116
R153
C404
IC401
R110
R220
R221
R222
R223
R210
R209
R218
R219
R408
R157
R156
C403
R224
R208
R207
R206
R205
R204
R203
R202
R405
C151
C152
CN202
M
M402
(SPINDLE)
A
MAIN BOARD
CN302
(Page 37)
HCD-GT22/GT44/GT55
X102
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
1-872-620-
11
(11)
2828
HCD-GT22/GT44/GT55
7-6. SCHEMATIC DIAGRAM – CD Board –
CN301
16P
OPTICAL
PICK-UP
BLOCK
(KSM-213DCP)
M401
(SPINDLE)
M
M402
(SLED)
M
SP-
SP+
SL+
SL-
• See page 36 for Waveforms. • See page 58 for IC Block Diagrams. • See page 61 for IC Pin Function Description.
C107
0.1
Q301
2SA2119K
AUTOMATIC POWER
C301
0.1
C405
0.1
CONTROL
R303
C306
2.2
100
C303C302
1010
C404
0.1
10V
R304
2.2
C309
0.001
C403
0.1
R301
C307
100k
1
R302
0
R143
47k
C137
0.01
1
C100
0.1
C139
C106
100
10V
C105
0.1
C144
0.1
C148
47p
C104
0.1
C140
C141
C142
TP124 (VC)
R144
C143
C146
C145
C149
R405
10k
R402
2.2k
0.01
TP121 (RFI)
R145
R146
R147
R148
R149
C150
R142 R139
22k 47k
470p
C138
0.01
0.0022
0.1
22k
0.01
470p
0.01
0.1
C147
22p
0
0
0
0
0
0.001
R150
0
C136
47p
R129
1k
470k
R134
R140
1M
0
R136 R135
22k 470k
C112 C108
R130
4.7k
0.1 0.1
R128
0
R119
IC101
CD-MP3 PROCESSOR
IC101
TC94A70FG-008 (S, D)
C153
R118
100k
R114
0.1
10k
R121
100
0.1
C133
R112
100
100
R111
R110
10k
0.1
C110
R153
1M
R154
C115
47
R155
22
6.3V
0.1
C116
1M
2
C117
0.022
C119
0.022
C118
0.01
C120
0.01
0
R151
C123
470p
C122
470p
C101
0.1
220
R101
0.1
C102
0.0022
C127
0.0047
0.1
C124
C126
0.1
0.0047
C113
C125
C103
0.1
R105
16.9344MHz
5p
C128
R102
10k
1k
1M
R106
X102
5p
C130
C132
0.1
R104
0
CN202
R224 100
R109 100
R108
R216
100
R214 100
R213 100
R211
R212
100
R210
100
R209
100
R218
100k
R219
100k
R220
100k
R221
100k
R222
100k
R223
100k
R208
100
R207
100
R206
100
R205
100
R204
100
R203
100
100
27P
DATA
CLK
+
+
A
MAIN
BOARD
(3/4)
CN302
(Page 40)
IC B/D
C207
1
R157
100
R156
100
C205
C201
0.1
100
10V
C109
0.1
TK63115SCL-G@GT
IC201
+1.5V REGULATOR
C202
C204
100
0.1
10V
IC201
C206
1
C151
470p
470p
C152
R201
0
R202
0
S201
(LIMIT)
+
HCD-GT22/GT44/GT55
IC401
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
BA5826SFP-E2
SP-
SP+
R414
4.7k
IC B/D
SL+
SL-
R408
2.2k
C401
R415
220
47k
10V
2929
HCD-GT22/GT44/GT55
• Semiconductor
Location
Ref. No. Location
D701 E-7
D711 E-7
IC701 F-7
IC712 F-8
IC731 F-5
Q731 C-9
7-7. PRINTED WIRING BOARDS – CHANGE Section –
1 2 3 4 5 6 7 8 9 10
A
B
C
12
CN721
SENSOR BOARD
D
MOTOR (TB) BOARD
741
CN
1
731
3
CN
E
741
M
(TABLE)
M
F
• See page 27 for Circuit Boards Location.
MOTOR (LD) BOARD
M751
(LOADING)
M
1-687-133-
E
C
IC731
A
K
SW BOARD
12
(12)
S711
ROTARY ENCODER
DISC TABLE
ADDRESS DETECT
12
(12)
1-687-132-
: Uses unleaded solder.
DRIVER BOARD
2
N704
C
CN703
C751
1
737
C
C736
C735
723
4
1
R
R722
721
R
701
702
701
R
R
D
IC701
1
713
JW
714
JW
D711
705
N
N702
C
R733
734
R
R732
710
JW
C741
708
709
JW
JW
713
R
711
R
R
IC712
712
1
JW
736
R
704
JW
703
JW
702
JW
731
R
C
12
731
Q
E
711
707
JW
706
JW
705
JW
R751
752
C
712
JW
C715
B
701
CN
MAIN
BOARD
(Page 37)
HCD-GT22/GT44/GT55
9
S751
DISC TABLE
OPEN/CLOSE
DETECT
OPEN
G
742
CN
12
1-687-134-
(12)
CN751
CLOSE
2
1
JW
9
701
C731
1-866-201-
12
(12)
H
12
1-687-669-
(12)
3030
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